Fully adjustable height and arm length to properly fit 96% of all adults 5'2" to 5'10". The saddle grips naturally and is well-ventilated for continuous air circulation.. Articulated saddle design pivots and rotates in tandem with body movement.. 1.25 inches of built-in dampening. The pliable membrane sling provides suspended support, creating a rest for the underarm of unparalleled comfort.. Ergonomic handgrips contour to the hand, maintain a natural wrist angle and evenly distribute load across the palm.. Handgrips are specifically left/right handed.. The legs are offset to provide hip clearance and limit the potential for tripping.. Rocker feet with over-molded, natural rubber pads maintain full contact throughout the stride and are proven to require less exertion.. . WARNING: This product can expose you to bisphenol A (BPA), which is known to the State of California to cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.